Gas Cooling and Conditioning

RELAB nozzles are used for gas cooling or quenching to create stable conditions for downstream components' safe and efficient operation. In many processes, gas temperatures become high enough to damage downstream equipment. The increase in temperature is caused by direct combustion, as in flue gas, or by secondary heating. The quickest, most effective way to cool a hot gas is to evaporate an injected liquid. Changing the phase of the injected fluid to gas consumes enormous amounts of energy compared to sensible/direct contact cooling.

In evaporative gas cooling, a mist of water sprays into the hot gas. In many cases, this is flue gas from a combustion process. The water then evaporates, cooling the system rapidly as the energy changes the water from liquid to gas. When a volume of water atomizes into smaller droplets, more surface area is exposed, allowing the evaporation rate to increase. The evaporation rate is critical as the gas must reach its final temperature before a fixed point downstream. The evaporation rate is mainly dependent on the droplet size, temperature differential, and partial pressure, among other variables.

Our engineers perform detailed calculations to determine the ideal nozzle, droplet size, and pressure for each system.